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Weldability and Weldability Testing |
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Weldability and Weldability Testing - Weldability is the capacity of a material to be welded under the fabrication conditions imposed into a specific suitably designed structure and to perform satisfactorily in the intended service.
This implies that a metal with good weldability can be welded readily so as to perform satisfactorily in the fabricated structure.
Weldability encompasses the
(i) Metallurgical Compatibility of a metal / alloy with any specific welding process.
Metallurgical compatibility implies that the base metals and weld metal can be combined within the degree of dilution encountered in a specific process without the production of deleterious constituents or phases.
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(iii) Ability of the metal / alloy to be welded with mechanical sound ness.The mechanical soundness must meet soundness requirements and normal engineering standards.
(iii) Serviceability of the resulting welded joint. Serviceability factors, e.g., may concern the ability of the welded structure to workunder low and high temperatures, impact loads, etc. A metallic material with adequate weldability should fulfill the following requirements:
(i) Have full strength and toughness after welding.
(ii) Contribute to good weld quality even with high dilution.
(iii) Have unchanged corrosion resistance after welding.
(iv) Should not be embrittled when stress relieving.
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